Reversing apparatus for regenerative furnaces.



v 0. H. DAWSON. I REVERSING APPARATUS FOR REGENERATIVE FURNACES.

Patented June 11, 1918.

4 SHEETS-SHEET! I APPLICATION FILEDJUNE 5, 191?. l,%69,165.

O. H. DAVISON. RE VERSING APPARATUS FOR REGENERATIVE FURNACES.

' APPLICATION HiEI) JUNE 5| 1917- 1,2695165.

Patented June 11, 1918.

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4 SHEETSSHEET 2- Z722 672ZZZ O. H. DAVISON REVERSING APPARATUS FOR REGENERATIVE FURNACES. APPLICATION Hug UNE 5 m1.

1,%69,,165,' Patentd June 11, 191.8.

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uouucl puuuu 0. H. DAVISON. REVERSING APPARATUS FOR REGENERATIVE FURNACES.

APPLICATION FILED JUNE 5-l9l1.

Patented June 11, 1918.

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-BIN H. DAVISON, OF CHICAGO, ILLINOIS, ASSIGNOR 'I 0 BLAIR ENGINEERING COM- IPANY, OF CHICAGO, ILLINOIS, A CORYORATION OF NEW YORK. I

REVERSING APPARATUS FQ R REGENERATIVE FURNACES.

Specification of Letters Patent. Patented June llll, ililllls.

Application filed June 5, 1917. Serial No. 172,907.

To all whom it may concern:

Be it known that 1, Gem H. DAv1soN, a citizen of the United States, residing at Ch1-' cago, in the county of Cook and State of Illinois, have invented a new and useful Im provement 1n Reversing Apparatus for Begenerat1ve Furnaces, of whlch the following is a specification.

The primary object of my invention is to improve the mechanism of the apparatus of Letters: Patent of the United States No. 929,277, granted July 27, 1909 to Thomas S. Blair, Jr., for a reversing apparatus for regenerative furnaces, to the ends of materially simplifying the construction, facilitating the switching ofthe elbow-like flueconnecting ducts, and greatly decreasing the weight of the apparatus, reducing the cost' ofits manufacture, and the expense of its maintenance and operation. I

The following general description of the patented apparatus and its operation will facilitate comprehension of the present improvements and avoid the need of herein illustrating and describing them with reference to more than one of the reversing flue terminal connecting ducts, its attending parts and features cooperating with it:

Swinging ducts are provided for reversing the gaseous fuel and combustion-supporting air through the furnace including the checker-work underneath, all .being under the influence of the stack-draft, and each of the two gas-conducting fines has its communication with the gas-supply equipped with a shut-off valve. 'Each duct is rotatably and tiltably mounted at one end on the water-sealed terminal of a flue and is adapted to be seated at its opposite end matically raised out of the way of the swinging end of the respective duct in being.

switched from the terminal of one flue to that of the other, whether these latter be air or gas fines, For raising the swinging ends of ducts out of their seats preparatory to turning them for'the switching purpose, a

. power-cylinder is provided on a superstructure or elevated working platform extending over the ducts; and for turning the ducts, after being thus tilted, to switch them .to their reversing positions, they are provided about their axially rotatable ends with cables connected with piston-mechanism for switching the several ducts simultaneously.

These ducts are very heavy, each weighing several thousand pounds, so that the matter of tilting to raise them for the aforesaid purpose tends to strain the mechanism; and

in res'eating it is difiicult to so control them in lowering as to avoid their dropping heavily against their seats with the liability of smashing and disorganizing the mechanism. To overcome these diiiiculties I have provided a loop-form of truck having camways at its ends and preferably located between the axially rotating and swinging duct-ends for gradually raising and lowering the swinging end of the duct out of and into its seat in initially turning and registering it, and guiding the'duct to its reversing position while being switched by the application of suitable power; and this constitutes and is, with other features, hereinafter described as illustrated in the drawings, in which ,the principal. feature of my improvement,-

accompanying Figure 1 is a plan view showing my.im

provements as they may be applied to a stack-flue terminaland a pair of air-flue terminals, the switching duct being represented partly in section on line 11, Fig. 2, and partly by dotted lines; Fig. 2 is a section on line 22, Fig. 1, and Fig. 3 shows the same by a brolien sectional view, with the duct in tilted position for swinging it; Fig. 4 is a view in front elevation of the showing in Fig. 1; Fig. 5 is a broken view of a sec-' tion on line 5-5, Fig. 1; Fig. 6' is an en,- larged partly broken and sectionalplan view showing a desirable form of electrical power mechanism for swinging the duct, and Fig. 7 is a diagram showing the electric switchcontaining circuits.

' The flue-terminal 9 is surmounted by an annular trough 10 form ng. a water-seal.

The elbow-like duct 11 is provided about its I end registering with the terminal 9, with an internally-flanged thimble-like extension 12 to dip into the watenseal, and it carries lie cause its one arm to close the line to at a branch therein, and the other arm to connect the wire whwitha wire 10 leading to the partial ring 38, thereby connecting the wires L0 and w and closing the circuit over wire wthrough the motor, and over the ring .37, brush, partial ring 38 and wire w to the return-wire w, thus energizing the motor to turn the crank through its remaining half-revolution and swing the duct to the end of its throw in the opposite direction for seating it in the trough on the other terminal into registration with the latter.

Each flue-terminal 15 and 16 isprovided with a hinged lid or cover 4s having the hinge-pintle 45 g'ournaled in cars 46 on the res ective trou h.

An arm 47 extending from each pintle and connected with the outer face of the respective lid 4A carries on its outer end a pin 4-8, with which one end of a link 49 is pivotally connected, the other link-end being pivotally connected with the stud 21, as shown inl ig. 1. The lids are adapted to extend, for closing the. flue-ten minals, over the inner walls of the respective troughs and dip at their annular lips or flanges into the water therein to seal the closure; and they are so arranged thatwhen the duct is turned from one flue-terminal to register with the other, the lid on the latter is raised, by its link-connection with the stud 21, out of the way of the swinging end of the duct to enable seatingthereof without obstruction, and the link-connection with the stud of the other lid causes the latter to be lowered on its hinge over the inner wall of the adjacent trough to close that fiue-terminal. /Vhen the fines having the terminals 15 and 16 are air-tines, it is desirable to adapt the lids to act as valves for regulating the admission of air. into the fines. For that purposeeach link is provided in its outer 'end with a longitudinal slot 50, through .which the pivotal connection of the respective arm47 is made; and each cover has attached to it one end of a cable 51, the opposite end' being adjustably fastened to any suitable overhead device, which may be on the aforesaid superstructure. By properly should befully closed adjusting the length of the cable, the hinged cover may be arrested by it to desired extent, short of closing the terminal. With the pivotal connection of the arm 47 and link in a slot 50, the resultant'lost mot-ion in the one direction of the respective link will always permit the lid to he raised out of the way. of the duct in seating and, in the other direcf tion, will notengage' "the pivot-pin in the slot after the lid has closed to the extent permit- I understood, the lid on one gas-flue terminal when that on another ,such terminal is full 0 en,"so that forthe fllids-onsueh terminal; "theiroperating'links with which other cam-way 19 until seated therein. Thus ted by its adjusting cable 51.. As will be dispensing with aforesaid concurrent application. 1 {realize that considerable variation is pos sible' in the "details" of construction thus ere are no slots in spective arm 47 should then be'pivotally connected at a fixed point; and no cables 51 are used.

To operate the apparatus for swinging the duct from .its illustrated position of connecting the terminals 9 and 15 to that of connecting the terminals 9 and 16, the switch 43 is thrown to the points as, m (Fig. 7), thereby energizing the motor to drii'e the gearing in the housing 23 and turn the crank 29 to ride the wheel up the inclined side of the cam-way 19, in which it is shown'to be seated in Fig.4 and along the track 18 and thence down the inclined inner side of the the ,duct is tilted backwardly on the journals of the. wheels 13 to raise the swinging duct end, while supported by the respective cam-way, out ofthe water:

seal trough of the flue-terminal 15 and carry it along the horizontal section of the track 18 until it attains the other caniwvay,

.downwhich the wheel rides, supporting the duct at that end until seated, to enter the duct-end into the adjacent troughvl7. To

swing the duct from the position last described to that in which the drawings represent it, the switch 43 is thrown to the 4 points x :12 to again enrgize'thc motor.

Either movement of the duct, the links49 being connected with the stud 21, closes the lid on the flue-terminal which the duct is leaving and raises the other lid to remove it out of the way of the duct-end in approaching its seat-in the adjacent trough 17. By riding the duct along the cam-ways,

cables and their rigging for tilting andturning it, shown and described in the aforesaid patent, are dispensed with, resulting in economy and simplification of the apparatus;

raising and lowering the swinging duct-end Y resultant tendency to disorganize the appa ratus. 7 p

The loop-form of the track 18, with its at.-

tendantadvantages hereinbefore named, is

an improvement upon the apparatus forthev same purpose, forming the subject of the application 01" Thomas S. Blair, Jr., filed concurrently herewith on the 5th day of June, 1917 andthis whether the track be located asillustrated and described herein or in the path of the swinging duct-end, both lscations being shown insaid application.

..Moreover,-'my construction is the simpler in the turn-table feature of the I Tel track to guide jonrnalled 0n the duct between its specifically shown and described, and I do not intend by illustrating a single specific or preferred embodiment of my invention to be limited thereto, my-intentiqn being in the following claims to claim. protection upon all the novelty there may be in my invention as fully as the state of the art will permit.

I claim:

1. In a regenerative-furnace reversing apparatus, the combination of a flue-terminal, a switching duct rotatably and tiltingly sup-' ported at one end on said terminal, a pair or flue-terminals alternately with which the opposite swinging end of said isters, and a track comprising a loop having cam-ways at its ends for guiding. the duct in moving from one'to the other of the flue-terminals of said pair.

2. In a regenerative-furnace reversing apparatus, the combination of a flue-terminal,

a switchingduct. rotatably and tiltingly supported at one end on said terminal, a pair of tiueterminals alternately with which the opposite swinging end of said duct registers, a loop-track having cam-ways at its ends, and a wheel on the duct riding in said the duct in movin into and out of such registration.

3. In a regenerative-furnace reversing apparatus, the combination of a flue-terminal,

a switching duct rotatably and tiltingly sup-- ported at one end on said terminal, a pan: of flue-terminals alternately with which the opposite swinging end of said duct registers, a loop-track having cam-ways at its ends and extending between said first-named terminal and said pair of terminals, and a wheel on the duct ridingsaid track to support the duct in moving into and out of such registration. v

i. In a regenerative-furnace reversing ap-' the combination of a flueterminal, a switching duct rotatabiy and tiitingly supported atone end on said terminal, a pair 0 flue-terminals alternately with which the opposite swinging end of said duct regisparatns,

'ters, a track comprising a closed loop having cam-ways at its ends and extending between said first-named terminal and said pair of terminals, and a flanged wheel ends to duct regparatus,- thecombination of a flue-terminal,

a switching duct rotatably andtiltingly supported at one end on said terminal, a' pair' of fine terminals alternately with which the opposite swinging end or said duct regis; ters, a track comprising a loop having; camways at its ends for guiding the duct in moving from one to the other of the flue ter minals out said pair, and electric power mechanism including a crank connected with said duct for swinging it.

6. in a regenerativefurnace reversing apparatus, the combination of a flue-terminal, a switching duct rotatably and tiltingly supported at one end on said terminal, a pair of flue-terminals alternately with which the opposite swinging end of said duct registers, aim-ways between said first-named terminal and said pair of terminals duct at a point between its ends in movlng out of and into said registration, and power mechanism for swinging said duct, comprising an electric motor, gear-mechanism geare to the motor shaft and carryinga contactbrush and a crank having a link-connection with said duct, a switch in circuit with said for guiding the motor and with which said brush contacts,

and a circuit'controlling'throw switch.

7. in a regenerative-furnace reversing apparatus, the combination of a flue-terminal, a switching duct rotatably and tiltingly sup ported at one end on said terminal, a pair of fine-terminals alternately with which the opposite swinging end of said duct registers, cam-ways and an intermediate track between said first-namedterminal and said pair of terminals for supporting the duct at a point in moving from one to terminals of said pair, and power-nnaith anism t'or swinging said duct, comprising an electric motor, the motor-shaft and carrying a contactbrush and a crank having a link-connection -with said (inch a. switch in circuit with said motel and with which said brush contacts, and a circuit-controlling throw-switch.

GRIN n. navison. I

gear-mechanism gearedto 

